>
数学
>
3(n-1)²-2(n-1)+1怎么化简
人气:182 ℃ 时间:2020-02-06 06:16:30
解答
3(n-1)²-2(n-1)+1
=3(n²-2n+1)-2(n-1)+1
=3n²-6n+3-2n+2+1
=3n²-8n+63(n²-2n+1)看不懂(n-1)²=n²-2n+1
推荐
化简√[(3又1/2)²+(1/2)²]
(n+1)²-n²能否化简?
化简(√M)²-(√-N)²=
化简:1*1!+2*2!+3*3!+.+n*n!
先化简再求值:5m²n-1/2(8mn+2n²)+4(m²n+mn-2n²).其中m=-3,n=2
he was ___ (too much,much too) worried about his son.请问此处填啥?
一元二次方程kx2-(2k-1)x+k+2=0,当k为何值时,方程有两个不相等的实数根?
怎样让在地震中的房屋不容易倒塌
猜你喜欢
可恶的数学题
将28g KOH溶于水配制成1L 溶液,此KOH溶液的物质的量浓度是( ) A.0.5mol•L-1 B.1mol•L-1 C.2mol•L-1 D.4mol•L-1
in my o____ it is a good plan but hard to carry out
用1,2,3,4,5,6,7,8,9这九个数字写出三个大小相等的分数.(每个数字只允许用一次). 例如:3/6=7/14=29/58.
已知二元一次方程2x-4y=5,用含y的代数式表示x,x=______;当y=-2时,x=________.
I when to Beijing when I was young这句对不
已知ai∈R+,且a1+a2+...ai=1 求证:(a1+1/a1)^2+(a2+1/a2)^2+...+(an+1/an)^2>=(n^2+1)^2/n
高一上学期语文要背的课文
© 2026 79432.Com All Rights Reserved.
电脑版
|
手机版